
The Android version of the WhatsApp app exists
in two builds – the stable branch which can be found on the Play Store and
another one which is distributed directly from the company’s website.

Various screenshots of the rumoured upcoming voice calling feature on
WhatsApp
The version on the company website, gets
updated more frequently and has a lot of hidden features which undergo testing
before it is ported as a stable build on the Play Store. The latest version on
the company website had a lot of hidden secret screens that were unearthed.
These screenshots point to a voice calling functionality which will most likely
be seen on WhatsApp sooner rather than later.
Although officially unconfirmed, the
screenshots point to the fact that voice calling is being tested on WhatsApp.
The calling functionality and chatting functionality appear as separate. Call
logs, dialling and contacts screen is handled by separate screens.
Another interesting feature includes call
recording and playback.
There is no word out if this will be a paid
app. But if the past is any indication, the voice calling feature will also be
offered for free considering apps such as Viber, Line and Skype already offer
it.